Home / 81,143.40-121,715.10-49,996.20

Finding the Fourth Proportional to 81,143.40, 121,715.10 and 49,996.20

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Solution

The fourth proportional to 81,143.40, 121,715.10 and 49,996.20 is: 74,994.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,143.40 : 121,715.10 = 49,996.20 : x
  2. Step 2: Convert to fraction form
    81,143.40/121,715.10 = 49,996.20/x
  3. Step 3: Cross multiply
    81,143.40x = 121,715.10 × 49,996.20
  4. Step 4: Simplify right side
    81,143.40x = 6,085,292,482.62
  5. Step 5: Solve for x
    x = 6,085,292,482.62/81,143.40
  6. Step 6: Final answer
    x = 74,994.30

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.